Safety weighing attachment for elevators.



H. D. ALBERT.

SAFETY WE'JGHING ATTACHMENT FOR EiEVATORS.

APPLICAHON FILED DEC- !8, 19!].

Patented Nov. 19, 1918.

ANGER Ill! [Hill HH -1|Hlll mllmlmnmuHm Pennsylvania.

HARRY D. ALBERT, 0F PHILADELPHIA, PENNSYLVANIA.

SAFETY XVEIGHING ATTACHMENT FOR ELEVATORS.

specification of Letters Patent.

Patented Nov. 19, 1918.

Application filed DecemberlS, 1917'. Serial No; 207,740.

To all whom it owif/ concern:

Be it known that l, citizen of the city and couc State of ful SafetyWeighing Attachment for Elevators, of which. the following is uspecification.

My invention cons ff an elevator having s. weighing attachment to thecur thereof and of a danger signal to'indicute an overloaded conditionof the cur. To this end the floor of the can is of the order of theplatform. of a scale, the same being superimposed on organized scslelever members so that, weight on said i operate said members andtransmit motion to an index finger or hand of a dial, which finger orhand is adapted to form an electric circuit with a danger signal whichwill be illuminated at a predetermined weight when a safe condition ofthe loaded car has passed, thi'ls notifying; operator of the elevator ofthe danger and the requirement of reducing the load.

Tie invention is satisfactorily illustrated in the accompanying drawing,but the important instrumentslities thereof may e varied, and so it isto be understood that details shown and described, long as they arewithin the spirit or. scope of the claims.

The figure represents e partial front eleration, and a. partial verticalsection of a safety attachment for an elevator embody ing my invention.

Referring to the drawings,

1 designates a portion of the our of an elevator which excepting thefeature of my invention applied thereto is of usual nature.

Above the base of the car 1 is the weighling-scale mechanism 3 ofapproved form, the levers i thereof mounted on the car have imposed onthem the supplemental floor 5 of the car, said supplemental floorcomprising the movable platform of the weighing-scale mechanism, saidplatform being vertically movable as usual in platform scales.

The sides of the scale plat-form are freely fitted in the verticalchanneled pieces 8 which are secured to the side walls of the car 1' andserve to guide the scale platform in lowering and returning motions, and

- owing to the inturned flanges 7 on the tops J. VG lllVG-llbfill ll newand llSeorm will tile invention not limited to the specific lovers 4 isthe lower end of u rod or bar 9 which passes freely upwardly therefromut the back of or through another proper portion of the'car to an upperpart of the latter where its top portion is provided with the rack 11,with which meshes the pinion 12 to whose shaft 13 is connected the indexfinger or hand 14: which is provided with a suitable point 14 of copperor other mate rial adapted to sweep over a graduated dial which withsaid shaft 13 are mounted in the present case on said upper part of thecar.

The coupling 8 of the beams 4 of the weighing scale mechimism will beseated on a. spring of predetermined power as the counterpoise of thescale mechanism, and consequently of the movable platform.

0n the rack bar 9 below the scale platform 5 is the collaror shouldermember 10. which may be of the form of a sleeve or an arm fitted on andsecured to the lower end portion of said bar and being seated on thecoupling 8 of the levers 4c of the scale mechanism, it being noticedthat while the platform 5 is imposed on said levers it is also seated onthe collar or shoulder memberlO, whereby as said platform descends whenloaded, it draws down said bar and causes an operation of the scalemechanism and a consequent weighing of the load as indicated on'thedial.

On the peripheral portion of said dial are the contact points 15 ofcopper or other suitable material adapted to be engaged at a certaintime by the point of the index finger or hand 14, as will be hereinaftermore fully described.

On the, car in the present case on the upper part thereof is theelectric lamp or light 16 and also the conductors 17, which areconnected respectively with the said light- 16 and the contact points15, and extend from a batterv, not shown, whereby said points and lightare in an electric circuit.

It will be understood that the elevator is capable to carry a load of apredetermined weight, and if it exceeds the latter it will be dangerous.Now as the load is imposed On the car the platform 5 will descend, andwith it the shoulder member. the levers of the weighing: mechanism areoperated and the rack bar being carried down by the platform subject tosaid weighing mechanism, whereby the index finger or-hand is operatedindicating on the dial the extent of the load on the car Should aid fin'er pass the safety graduation on lhc dial, whatever that may be, asdetermined upoin said finger will contact With the points 15 whereby acircuit is'iormed with the electric lamp 1G and the latter Will. beilluminated indicating by its color the danger of the situation, whenthe elevator attendant Will know that the load must be reduced,otherwise it the elevator operated it may break down or run aw When thepredetermined load is reestablielncd or about reestablished, as theindex linger will Show and the light extinguished, the elevator may be oerated Without danger as the load concerned.

ll hen the car emptied the platform and weighing e ec'hanism andlllLfdPI linger return to their lornial oositicn.

Having unis desci" i, my invention "what it claim as new and desire tosecure by Letters l atent, is

l, A Weight-safety atta W nt. for the car of an elevator, comprising anelevator car the scale levers supporting the platform and a scaleplatform supported thereby, vertical member seated on the levers of thescale and movable upon the deecent of the platform, a graduated member,a movable index finger cooperating therewith, and means in eluding saidV0 ical member whereby said finger is actuated by the depression of theplatform and tile actuation of said levers.

A weightsafety attachment for the car of an elevator, comprising anelevator car the scale levers supporting the platform and a scaleplatform supported thereby, a vertical member seated on the levers ofthe scale and movable upon the descent of the lattJ-cpiee of this patentmay to- @1111, a graduated member, a .unival i finger coiiperatnigtherewith, me includ- 111g said vertical member whereby I a movableplatform therein, coupled levers .3

of a Weighing mechanism interposed between said platform and the floorproper in the car said Jlatiorin being imposed on said levers, a graduall dial on the car, a movable indc a collar n'nmr .lnigei: nioinited. onsaid dial,

the coupling of the level-e of the iechf "1 and cow neetion fer said c vlla'r' with the aXis cl? said index lingo said connection being movableupon the descent of the platform 1%. "l ii eight satiety attachment forthe car of an. elevator comprising an elevator car, a movable platformtherein lovers of a Weighing mechanism interposed between said platformand the floor proper oi the car,

- said plattoi-nrbei ng interposed on said levers a graduated dial onthe car, a movable ind *2; finger mounted on said dial, a connection.for said lovers with the axis of said ind x;

finger, and movable with the weighi mechanism, contacts on said dial, asignal,

and means for fencing an electric circuit to); said index finger withsaid contacts and. loithe latter with said signal.

.lllillthiY ALBEFRR ficaimicsiener oi Patents,

ted to said linger

